This 7” tall 360-degree radial flow air filter features a 4” round flange and our oil-free Pro DRY S media with three layers of synthetic media for maximum convenience. Its progressive layering provides great filtration efficiency and dust holding capacity, while not requiring the use of oils. This media is best suited for street and light off-road use. The included performance air filter is surrounded by an open-element cross-link polyethylene (XLPE) polymer housing that minimizes warm engine air for maximum performance. Its open design allows for easy viewing of the air filter, yet creates a heat-blocking seal when the vehicle’s hood is closed. It connects to the vehicle’s factory air inlet with no additional hardware. This system features a high quality, computer-designed, dyno-tuned intake tube to achieve maximum power gains while maintaining a perfect fit. Its XLPE material is heat-soak resistant and extremely durable. This intake is designed to use factory mounting locations, minimizing the use of unnecessary hardware, ensuring a perfect fit every time. Its innovative design makes for a hassle-free, direct bolt-on installation process that requires no cutting or drilling. Its revolutionary design, featuring our patent pending filter-to-housing interface uses half the number of parts of a traditional cold air intake system. Fits both active and non-active steering. Magnum FORCE Stage-2 Cold Air Intake System w/ Pro DRY S Media BMW 128i/325i/328i/330i (E82/88/90/91/92/93) 06-13 L6-3.0L N52 BMW 128i/325i/328i/330i (E82/88/90/91/92/93) 06-13 L6-3.0L N52